Howdy folks!

[pushpull7591]

Well, this is my first post so I thought I'd stop by and say "hi!"

I got my first tube amp-an HH Scott 299C a couple years back. Learned a lot restoring that and loved the sound. That led to restoring a 299B and then a 296.

The 296 kinda weaned me off the pleasures of restoration-I guess restoring a 296 can do that to a guy-and I got the itch for a DIY.

I loved the sound of those 7591s better than anything else I'd heard so the first project is: you guessed it, a push-pull 7591-based stereo amp!

I'm knee-deep in it now, waiting for more parts and coming up with more and more questions!

Hope I can find some answers, and maybe pass along what little I know along the way.

Best,
PP7591

 

[EC8010]

Welcome to the forum. We're always keen to extend a warm welcome to valve DIYers. I had to look up the books to see what a 7591 was, but it looks as though you should be able to make a nice PP amplifier with it.

 

[pushpull7591]

Hiya ec8010, and thanks for the welcome!

As for the 7591, it was used in some vintage amps, but kind of fell by the wayside since the pin-out is different than EL or 6L6 types, making swapping a bit difficult. Guess that makes it kind of a red-headed stepchild of sorts for a DIY-but then I've always had a soft spot for the underdog...

Best,
pp7591

 

[EC8010]

As for the 7591, it was used in some vintage amps, but kind of fell by the wayside since the pin-out is different than EL or 6L6 types, making swapping a bit difficult.

I expect that makes it cheaper (and being NOS, possibly better).

 

[planet10]

Welcome, PP7591

I expect that makes it cheaper (and being NOS, possibly better).

IIRC, it became vry hard to find, so became quite dear, but there is "new" production now?

dave

 

[pushpull7591]

Hey planet10-thanks for the welcome as well!

They were indeed a bit scarce for a while-a matched quad of NOS could go for as much as $2-400, depending on the manufacturer!

In the last few years Electro-Harmonix and JJ/Tesla have both come out with new reproductions. My experience with the EH has been very positive-and at @ $60-80 for a matched quad it's hard to beat the price.

I think it's a great little tube and just sounds "right" for my ears!


EC8010,

I've got a few NOS Westinghouse and RCA 7591s, and in this case-at least to my ears-I think the new production has the NOS beat!

Better AND cheaper than NOS?

It's a win-win situation!

Best,
pp7591

 

[EC8010]

Glad (and surprised) to hear current production is cheaper and better than NOS.